/Engine/Plugins/MovieScene/MovieRenderPipeline/Source/MovieRenderPipelineCore/Public/Graph/MovieGraphNode.h
An identifier that distinguishes this node from other nodes of the same type within a branch. During graph traversal, nodes with the same type and identifier are considered the same node. An empty string is a valid identifier.
virtual [FString](API\Runtime\Core\Containers\FString) GetNodeInstanceName() const